We have made a fix to the 'friendly_functions.php' file after release 3.2 has been issued.
 
Description
We have slightly modified an algorithm for generating friendly urls to use only english letters, digits and some symbols like '_', '-'.
 
Solution.
Please, download an updated version of the 'friendly_functions.php' file from here:
http://www.viart.com/downloads/friendly_functions-3.2.zip
Then extract the fixed file into the /includes folder of your shop replacing an existing one.
Don't forget to make a backup copy of the current file in case something goes wrong.